All civic tech is awesome, but a word of advice (may or may not be applicable in your particular neck of the woods, but definitely is in mine):

Public comment is one of the least effective mechanisms for influencing policy, at least at the margin. You can drastically amplify your influence with a simple change: move from public to private commentary, directly and personally addressing your state and local reps. They all have email addresses and I think it's more likely than not you'll be surprised when they (and it'll actually be them, not some factotum) respond to your email.

This would stop working if everybody did it, but I live in an unusually (famously, in fact) engaged municipality and have been unreasonably successful at influencing policy and the evidence I see is that almost nobody does this.

There's probably a civic tech thingy to do here. Though I'd also be mindful of the appearance of canvassing. My experience is that decisionmakers very quickly clock canvassing efforts, and then mentally bucket input into "low-effort" and "high-effort", often in a way that amplifies smaller interests.

I also think you can probably get a long way just by doing a better job than your policy adversaries at presenting information. Another thing I've noticed reps quickly clocking: the commenters who clearly have never read a budget, or who don't know the difference between an Enterprise Fund and the General Fund. These are also problems tech can solve, by digesting and contextualizing data so people can present informed (or informed-sounding) arguments.